Bug#561851: mii-tool reports full-duplex as half-duplex

Daniel Kahn Gillmor dkg at fifthhorseman.net
Tue Apr 26 19:54:21 UTC 2011


I'm also seeing 561851 on an up-to-date squeeze system:

> root at panther:~# ethtool eth0
> Settings for eth0:
> 	Supported ports: [ TP ]
> 	Supported link modes:   10baseT/Half 10baseT/Full 
> 	                        100baseT/Half 100baseT/Full 
> 	                        1000baseT/Half 1000baseT/Full 
> 	Supports auto-negotiation: Yes
> 	Advertised link modes:  10baseT/Half 10baseT/Full 
> 	                        100baseT/Half 100baseT/Full 
> 	                        1000baseT/Half 1000baseT/Full 
> 	Advertised pause frame use: No
> 	Advertised auto-negotiation: Yes
> 	Speed: 1000Mb/s
> 	Duplex: Full
> 	Port: Twisted Pair
> 	PHYAD: 1
> 	Transceiver: internal
> 	Auto-negotiation: on
> 	MDI-X: Unknown
> 	Supports Wake-on: g
> 	Wake-on: g
> 	Current message level: 0x000000ff (255)
> 	Link detected: yes
> root at panther:~# ethtool -i eth0
> driver: tg3
> version: 3.102
> firmware-version: 5782-v3.13
> bus-info: 0000:05:02.0
> root at panther:~# mii-tool -v eth0
> eth0: negotiated 1000
baseT-HD flow-control, link ok
>   product info: vendor 00:08:18, model 26 rev 2
>   basic mode:   autonegotiation enabled
>   basic status: autonegotiation complete, link ok
>   capabilities: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
>   advertising:  1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
>   link partner: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
> root at panther:~# 


It would be great if this could be resolved.  these kind of false
reports make it difficult to trust the tools.

	--dkg

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